If you are not familiar with using Labels in Link-Live yet, please refer to the the Link-Live Video Series (available from the left-side menu under Support in Link-Live) or the article on Organizing Test Results for more information.
Normally, labels attached to a Unit are only associated with the unit and not test results. To attach a label to all test results from a specific unit, add a plus sign “+” in front of the unit's label on the Units page, as shown below.